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Repository for work on a Darwin Core ChronometricAge extension
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Change term - materialDatedID #17

Closed tucotuco closed 3 years ago

tucotuco commented 3 years ago

Change term

Proposed new attributes of the term:

tucotuco commented 3 years ago

It feels like the example for chrono:materialDatedID should use a materialSampleId instead of an occurrenceID. The material which was dated was not an occurrence, but a material sample. Consider a set of radiometric dates made from samples of tree rings from a core of a long lived tree, correlated by tree rings to a burned log found in a midden, clarity of what got dated how requires reference to the material sample that was dated. In RDF, linking through materialDatedID to an occurrence instead of a material sample is likely to lead to confused inferences about the related occurrence. I'm inclined to think that this goes beyond the example, and the definition of the term should be explicit about it relating to a material sample, not an occurrence.

Extracted from original post by @chicoreus in https://github.com/tdwg/chrono/issues/15#issuecomment-732249855

tucotuco commented 3 years ago

Makes sense to map dates to samples rather than occurrences to me. Although for mapping to GBIF we have to use occurrenceID's for every instance of a taxon, and thus in our export we will have to derive the dating information for every occurrence from the sample in which it was found. This will inevitably be a compromise, as many samples have many (forms of) dates, the resulting age range will be the min and max of these with information on how they were derived. (If this information is out of context just ignore me!)

Originally posted by @visead in https://github.com/tdwg/chrono/issues/15#issuecomment-732272263

tucotuco commented 3 years ago

We've been using this for the FuTRES metadata template and it is working well for paleontological and archaeological data. I like the idea of relating it to the class materialSampleID as if related materials are sampled it's important to distinguish that from the specimen, which is tied to the occurrenceID.

Originally posted by @megbalk in https://github.com/tdwg/chrono/issues/15#issuecomment-732473026

tucotuco commented 3 years ago

Example and definition updated to make MaterialSample the explicit target of a materialDatedID in commit 7da355bc0dfb4ab5d35db0ccd931feeb73d43187.

tucotuco commented 3 years ago

Passed public review.

tucotuco commented 3 years ago

Ratified! Closing.